Influence of magnetic stirring and electrolyte concentration in batch electrocoagulation for removal of colour and suspended solids in leachate / Nur Alyani Zulkifli

Generation of leachate landfill which carries heavy metals and other matters as well as unpleasant smell had been dangerously increasing over the years. To overcome this problem, treatment of leachate landfill needs to be performed. Aside from conventional method, coagulation-flocculation treatment, there is advanced method can be performed, which is electrocoagulation as effective removal of pollutants in the leachate landfill. The objective of this research is to determine the percentage removal of colour concentration and suspended solids present in the leachate sample from Padang Cina Sanitary Landfill (PCSL), Kulim by performing electrocoagulation method by focusing on the influence of magnetic stirring and the electrolyte concentration. The sample will be characterised in terms of temperature, pH, COD, turbidity, colour, and suspended solids. Then the sample will be treated in the electrocoagulation batch reactor model to carry out the research objectives. Evidently, at stirring rate of 200rpm and electrolyte concentration has the highest percentage removal of color and suspended solids which are 92.579% and 96.685%, respectively. Kinetic model was performed and the first-order of reaction rate fit for removal of suspended solids with the R2 value 0.9433. Meanwhile, for removal of color concentration showed the second-order reaction rate model fit the best with R2 value is 0.9205 with rate constant of -0.000152 L.mg-1min-1